by
Butler, L. J. (Lawrence J.)
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Copper mines and mining -- Zambia.
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Ferguson, James.
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Copper mines and mining -- Zambia -- Copperbelt Province.
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by
Halland, Håvard.
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Excerpt:
Ricardian and Hotelling Rents -- 2.4 Three-Month Copper Prices Compared with Three-Month Aluminum Prices
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